Add support for linting typescript files

LDrawLoader: Make lines honor material opacity

docs: remove flatshading update info

Color doesn't have a fourth argument

Cleanup: updateDeferredColorUniforms only accepts 5 arguments

Cleanup: no styles are needed when creating a node

Use roughness-dependent fresnel when rendering with multiscattering

Revert "Diffuse color has already been calculated relative to the specular, so use that directly to fix dark fresnel for indirect specular lighting."

This reverts commit d6577870.

JSM: Added module and TS files for modifiers.

JSM: Added more module and TS files for geometries.

Cleanup: Add a comma between imports

Examples: Moved ParametricGeometries into geometries directory.

Fix SkeletonUtils d.ts

Examples: Moved AnimationClipCreator to animation directory.

Examples: Clean up webgl_postprocessing_crossfade.